{% set the_list = [] %}\
{% set __macro_appender_2138849093_temp_variable_0__ %}\
{% set some_list = the_list %}\
{% if deferred %}
{% do some_list.append(deferred) %}
{% endif %}\
{% endset %}\
{{ __macro_appender_2138849093_temp_variable_0__ }}
{{ the_list }}


{% set foo = [1] %}\
{% do foo.append(deferred) %}
{% do foo.append(2) %}
{% set bar = foo %}\
{{ foo ~ 'and' ~ bar }}
